The Tan Xuyen communal temple, also known locally as the Than Hoang temple, was bestowed with a royal decree by Emperor Tu Duc on November 29, 1852 (the fifth year of Tu Duc's reign). The decree states: "The deity is granted the title of Quang Hau Chinh Truc Huu Thien Don Ngung, but is officially recognized as Tan Xuyen village, Long Xuyen district."

Royal decree issued by Emperor Tự Đức.

It is known that the name "Tan Xuyen Temple" originates from the place name at that time. The temple is a place of folk worship for the local people; it receives few visitors on ordinary days, but especially on the 13th and 14th of the third lunar month each year, the temple welcomes a large number of visitors from all over to attend the Ky Yen festival.

Mr. Dang Van Ut, Chief Priest of Tan Xuyen Temple, said: “The Ky Yen Festival aims to pray for peace for the people, for a year of favorable weather, bountiful harvests, and for everyone to live in peace and prosperity. The ceremony is very solemn, usually involving sticky rice and sweet soup, fruits, and especially a roasted pig and a white pig as offerings. Maintaining the annual organization of the festival contributes to preserving and promoting the cultural heritage values ​​of the locality and strengthens the bonds between the people.”